Below is production possibilities data for the countries of Mental and Etheric. Mental's production possibilities (in millions of units) A B C D E Soya Milk 80 60 40 20 0 Rice Cakes 0 10 20 30 40 Etheric's production possibilities (in millions of units) A B C D E Soya Milk 160 120 80 40 0 Rice Cakes 0 30 60 90 120 Refer to the information above to answer this question. Suppose that each country was producing combination D before trade but then specializes in the product in which it has a comparative advantage. What would be the total gains from trade? O 40 million units of rice cakes. O 40 million units of soya milk and 60 million units of rice cakes. O 60 million units of soya milk and 40 million units of rice cakes. O 100 million units of rice cakes. O 20 million units of soya milk